Pollen of Tepuia.  Left: Tepuia intermedia, tetrad in equatorial view, light microscope, oil immersion (from Steyermark 93980, type).  Right: Tepuia cardonae, tetrad in polar view, SEM (from Steyermark 74895).  Redrawn from the Memoirs of the New York Botanical Garden 29: 195, fig. 88C-D.  1978.